Steam-engine



(No Model.)

- T. JENNI.

- STEAM ENGINE.

N0. 338,076. Patented Mar. 16, 1886.

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UNITED STATES PATENT OFFICE.

THOMAS JENNI, OF ALLEGHENY, PENNSYLVANIA.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 338,076, dated March16, 1886.

(No model.)

To all whom, it may concern:

Be it known that I, THOMAS JENNI, a citizen of the republic ofSwitzerland, residing at Allegheny, in the county of Allegheny and Stateof Pennsylvania, have invented certain new and useful Improvements inSteam-Eugines, of which thefollowing is a specification, reference beinghad to the accompanying drawings.

My invention relates to an improvement in steam-engines; and it consistsin the combination of the operating-shaft, which has one of its endsprojecting directly through the side of the valve-chest, the rotaryvalve connected to this shaft, a gear-wheel. which is applied directlyto the shaft, and'the governor, which projects down through the top ofthe steamchest and is provided with a gear on itslower end to mesh withthe wheel on the shaft, whereby the governor and the valve are drivendirectly from the shaft, as will be more fully described hereinafter.

The advantages I claim for my valve are the simplicity and consequentfacility of construction, its durability and apt-ness for increasing ordiminishing the Volume of steam by the number of openings through whichthe steam enters into the cylinder, and the closeness with which itrevolves in its seat.

The accompanying drawings represent my invention.

Figure 1 is a side elevation and section through the steam-chest. Fig.2, a sectional elevation of the cylinder and steam'chest. Fig. 3, aninside view of the steam-chest, showing the valve-seat, the steam andexhaust ports. Fig. 4 is a perspective view of the valve with only oneopening for steam and the steam-chamber. Fig. 5 is a view of the samewith an elongated opening.

A represents a valve-rod with a bevel wheel, B, at one end that meshes asimilar wheel, B, on the main shaft. The other end of the rod A entersthe steam-chest H, and, in the form of a key terminates in the center ofvalve D. At the inside of the steam-chest, on the rod, is a bevel wheel,0, meshing with wheel 0 that operates the governor G.

D, Fig. 2, is a disk forming a circular r0- tat-ing valve with one ormore openings,5, according to the volume of steam desired to enter thecylinder, having a chamber, 4, that conducts the steam to the exhaust 3.

E represents the cylinder, and F a vertical rod, raised or depressed bythe governor to close or open a valve in the box I to shut off or admitsteam.

The operation is as follows: Steam being admitted into the steamchest H,enters the port 1 through the opening or openings 5 in the valve D, andpasses into the cylinder E behind the piston to set the engine inmotion. The valve D, turning with the revolving shaft or rod A, allowsthe steam, after propelling the piston, to pass into port 2, whence itenters the chamber 4. to escape through the exhaust-port 3. Thus thevalve-rod A, connected by bevel gearing with the main shaft, turns thevalve D and presents the openings 5 successively to the steam-ports 1and 2, to receive and exhaust the steam alternately.

As hereinbefore stated, the opening 5 in the valve may be a single one,as shown in Fig. 4, when only a small volume of steam is required, orthe number may be increased to two, three, or more, according to thepower needed. The bevel wheels 0 0 connect the valve-rod A with thegovernor G, to which the cross-bar J is attached, that when the speed ofthe governor is increased, raises the rod F to diminish or cut off steamby closing a valve in the box 1.

Having thus described my invention, 1 claim The combination of thedriving-shaft of the engine, the wheel B,applied thereto, the shaft A,having the wheel B secured to one end and having its other end toproject through the side of the steam-chest, with the wheel 0 foroperating the governor, and the rotary valve, which is applied directlyto the end of the shaft, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS JENNI.

lVitnesses:

LOUIS MoEsER, Ie. STAUFFER.

